Evaporative cooler construction



Jan. 25, 1966 A. D. GOETTL EVAPORATIVE COOLER CONSTRUCTION 8Sheets-Sheet 1 Filed June 10, 1965 INVENTOR. 04M Q 6 05/71.

; Jan. 25, 1966 A. D. GOETTL 3,231,247

TIVE COOLER CONSTRUCTION 1 e 10, Sheets S t NNNNNNN R. /%/7M 5. 50577ZMQZZMV JGENT Jan. 25, 1966 A. D. GOETTL EVAPORATIVE COOLER CONSTRUCTIONFiled June 10, 1963 INVENTOR. /Z70/7M 9. 60577-4 Jan. 25, 1966 A. D.GOETTL.

EVAPORATIVE COOLER CONSTRUCTION 8 Sheets-Sheet 4.

Filed June 10, 1963 INVENTOR.

. ADAM D. GOETTL BY Z Jan. 25, 1966 A. D. GOETTL EVAPORATIVE COOLERCONSTRUCTION 8 Sheets-Sheet 5 Filed June 10, 1963 INVENTOR. ADAM D.GOETTL 8 Sheets-Sheet 6 Filed June 10, 1963 I N VEN TOR.

. ADAM D. GOETTL Jan. 25, 1966 A. o. GOETTL EVAPORATIVE COOLERCONSTRUCTION 8 Sheets-Sheet 7 Filed June 10, 1

INVENTOR. ADAM D. GOETTL 5 I92 i-jyq Jan. 25, 1966 A. n. GOETTL3,231,247

EVAPORATIVE COOLER CONSTRUCTION Filed June 10, 1963 8 Sheets-Sheet 8 usA Q41;

I96 210 20s 2l4|98 INVENTOR. 20s ADAM D. GOETTL United States Patent3,231,247 EVAPORATIVE COOLER CONSTRUCTION Adam D. Goettl, Phoenix,Ariz., assignor to McGraw- Edison Company, Milwaukee, Wis., acorporation of Delaware Filed June 10, 1963, Ser. No. 292,184 22 Claims.(Cl. 261-24) This application is a continuation-in-part of a copendingapplication of Adam D. Goettl, Serial No. 859,757, filed December 15,1959, now abandoned.

This invention relates to an evaporative cooler construction and moreparticularly to an evaporative cooler construction having a top, a sumppan and one side of the cooler all integral and formed of a single pieceof sheet metal.

In the construction of evaporative coolers it has been common practiceto form two separate pans, one for the sump of the cooler and one forthe top thereof and to interconnect these pans by corner posts which arewelded or otherwise secured to the pans. Such conventional constructionusually involves extensive forming tools and also a substantial amountof labor in the pro duction thereof.

Accordingly it is an object of the present invention to provide anevaporative cooler construction wherein the sump pan, the top and oneside of an evaporative cooler are formed of a single piece of a sheetmetal.

Another object of the invention is to provide an evaporative coolerconstruction wherein a single sheet of metal is utilized to form a top,a side and a sump pan of an evaporative cooler by folding the sheetmetal at locations coinciding with the corners of the sump pan, one sideand the top of the cooler whereby forming dies normally used to producethe top and the sump pan are not necessary to the construction of anevaporative cooler in accordance with the present invention.

Another object of the invention is to provide an evaporative coolerconstruction wherein a top pan and a sump pan are provided with foldedcorners and wherein two of such corners are interconnected by cornerposts having slits in the ends thereof; said slits straddling the foldedportions at the corners of the pan and the top to hold the foldedportions together and to maintain a box shaped construction of the topand pan portions of the cooler.

Another object of the invention is to provide an evaporative coolerconstruction wherein the top, one side and a sump pan are all formedintegral with each other from a single sheet of metal whereby facilityand economy of production is attained.

Another object of the invention is to provide a very simple evaporativecooler cosntruction which requires a minimum amount of tooling attendantto the production thereof.

Another object of the invention is to provide an evaporative coolerconstruction having a novel centrifugal blower housing structuretherein.

Another object of the invention is to provide a novel evaporative coolerconstruction wherein channel shaped evaporative cooler pad framesupports prevent water from being moved upwardly between the edges ofthe pad frames and the main frame of the cooler by vibratory action ofthe pad which may be imposed by airflow therethrough.

Another object of the invention is to provide an evaporative coolerconstruction wherein evaporative cooler pad frame supports are providedwith a novel air sealincreases the overall efiiciency of an evaporativecooler.

Further objects and advantages of the invention may be apparent from thefollowing specification, appended claims and accompanying drawings inwhich:

FIG. 1 is a side elevational view of a flat blank of sheet metalillustrating by broken lines the bending and folding lines utilized toform the single sheet of metal into an integral structure comprising atop, one side and a sump pan of an evaporative cooler construction.

FIG. 2 is a sectional view taken from line 2-2 of FIG. 1.

FIG. 3 is an enlarged side elevational view of an evaporative coolerconstructed in accordance with the present invention and showingportions thereof broken away and in section to amplify the illustration.

FIG. 4 is an enlarged fragmentary sectional view taken from the line 4-4of FIG. 3.

FIG. 5 is a fragmentary sectional view taken from the line 55 of FIG. 4.

FIG. 6 is an enlarged fragmentary sectional view taken from the line 6-6of FIG. 3.

FIG. 7 is a fragmentary sectional view taken from the line 77 of FIG. 4;

FIG. 8 is a fragmentary sectional view taken from the line 88 of FIG. 4;

FIG. 9 is a view similar to FIG. 1 showing a modified blank from which acooler frame may be formed in accordance with the present invention;

FIG. 10 is a sectional view taken from the line 1010 of FIG. 9;

FIG. 11 is a view similar to FIG. 3 showing details of a modified formof the invention;

FIG. 12 is an enlarged fragmentary sectional view taken from the line12-12 of FIG. 11;

FIG. 13 is an enlarged fragmentary sectional view taken from the line1313 of FIG. 11;

FIG. 14 is an enlarged fragmentary sectional view taken from the line14-14 of FIG. 11;

FIG. 15 is an enlarged fragmentary sectional view taken from the line1515 of FIG. 11;

FIG. 1-6 is an enlarged fragmentary side elevational view of one cornerof the blank shown in FIG. 9 of the drawings;

FIG. 17 is an exploded fragmentary perspective view of a corner of theframe structure formed by the blank as shown in FIG. 9 of the drawingsand a portion of a corner post structure adapted to be coupledtherewith;

FIG. 18 is a view similar to FIG. 17 showing the corner of the framestructure and the corner post coupled and secured together;

FIG. 19 is a fragmentary enlarged side elevational view of a portion ofthe blank structure shown in FIG. 9;

FIG. 20 is an enlarged fragmentary perspective view of a cooler framecorner structure formed of the portion of the blank shown in FIG. 19 andillustrating a supports fixture in expoded position relative thereto;

FIG. 21 is a fragmentary side elevational view of the structure shown inFIG. 20 and showing the connection strap fixed to the corner of theframe and forming an anchor for holding the upper portion of the framerelative to the side wall of a building or the like;

FIG. 22 is a fragmentary side elevation of another portion of the blankstructure shown in FIG. 9;

FIG. 23 is a fragmentary perspective of a corner frame portion of themodified structure shown in FIG. 11 and formed from the portion of theblank illustrated in FIG. 22;

FIG. 23 showing an exploded position of a clip part relative to thecorner frame structure;

FIG. 24 is a side elevational view of the structure shown in FIG. 23with the stamp clip fixed to the corner of the frame structure andillustrating a supporting leg operable as a standoif leg engagable withthe side of the building whereby the cooler frame may be supportedincantly for position relative to the side of the building;

FIG. 25 is an enlarged fragmentary side elevational view of one cornerof the blank shown in FIG. 9 of the drawings;

FIG. 26 is an enlarged fragmentary perspective view of a sump and cornerportion of the cooler frame shown in FIG. 3 and formed of the cornerstructure of the blank shown in FIG. 25;

FIG. 27 is an enlarged fragmentary sectional view taken from line 27-27of FIG. 18; and

FIG. 28 is a fragmentary sectional view taken from line 2828 of FIG. 3.

As shown in FIG. 1 of the drawings, a fiat blank 10 of sheet metal isutilized, in accordance with the present invention, to produce anevaporative cooler frame structure having one side of the cooler framestructure integral with the top and the sump pan. This blank 10 isprovided with a rectangular portion outlined by broken lines 12 which isformed into a top 14 as will be hereinafter described in detail. Thisblank 10 is also provided with a rectangular side forming portion 17outlined by one of the lines 12 and other broken lines 18. It will beseen that two of the broken lines 18 are aligned with two of the brokenlines 12 which outline the rectangular top portion 14.

A sump pan section 20 is outlined by broken lines 22 and one of thebroken lines 18. It will be understood that the broken lines 12, 13 and22 represent break lines on which the single piece of metal is bent andfolded to produce a structure having one side of an evaporative coolerintegral with the top and the sump pan thereof.

The portion 14 outwardly of the lines 12 is provided with break lines 24at which the metal is folded at angles of 45 degrees to permit thesections outwardly of the lines 12 to be folded at right angles to theportion 14 in order to complete a substantially boxed shaped structureof the portion 14. Likewise, the portion 16 is provided with break lines26 at its corners which are integral with the portion 14; these breaklines 26 being at 45 degrees to permit the folding of a portion atsubstantially 45 degrees at each corner of the evaporative coolerconstruction at the juncture of the top portion 14 with the side portion16.

It will be seen that angular break lines 28 are disposed atsubstantially 45 degrees at a transition between the portion 16 and thesection 20. These break lines 28 form two corners of a folded structurearound the pan portion 20 so that sides 30 of the pan are formedoutwardly of the lines 22 substantially at right angles to the plane ofthe portion 20 so that a water containing sump pan is formed integralwith the adjacent side portion 16 which is disposed at right angles toboth the portions 14 and 20 when the evaporative cooler construction iscompleted in accordance with the present invention as will behereinafter described in detail.

As shown in FIG. 3 of the drawings the top portion 14 is provided withsides 15 which are disposed at right angles thereto on three sidesoutwardly of three of the lines 12 shown in FIG. 1 of the drawings.

The side portion 16 is provided with an opening 32 therein. This opening32 is disposed to provide an outlet for a centrifugal blower 34 disposedwithin the interior of the evaporative cooler construction as will behereinafter described.

The portion 16 which forms one vertical side of the evaporative coolerconstruction of the present invention is provided with narrow sideportion 36 at the corners of the structure and these portions 36 aredisposed generally at right angles to the plane of the portion 16outwardly of the fold lines 18 shown in FIG. 1 of the drawings. Theseportions 36 are similar at opposite edges of the portion 16 and the sideportion 36 as shown in FIG. 4 of the drawings is provided with avertically disposed channel portion 38 having an edge engageable with aconventional evaporative cooler pad frame as will be hereinafter described in detail.

The pan portion 20 is provided with folded corners 37 adjacent to thewall portion 16 and is also provided with folded portions 39 at cornersopposite to the corners 36.

The folded portions 39 as shown in FIG. 4 of the drawings, extendinginwardly at substantially an angle of 45 degrees from the sides 40 ofthe pan portion 20.

Corner posts 42 are provided with slots 44 in which the folded portions39 are disposed whereby these inwardly folded portions are held togetherby the corner posts 42 since the folded portions 39 are held captive inthe slots 44. The corner posts 42 are angle members having sides 46 and48 disposed substantially at right angles to each other. Integral withthese sides 46 and 48 are channel structures 59 and 52 respectivelywhich are disposed to support flanges of an evaporative cooler pad framestructure. It being noted that each of the channels 50 and 52 isengageable with a respective evaporative cooler pad frame 64.

These channels 56 and 52 retain resilient gasket strips 54 and 55 forthe purpose of sealing against the leakage of air between the posts 42and evaporative cooler pad frame structures which bear against saidchannels 50 and 52 at edge portions 56 and 58 respectively. It will benoted that the sealing gasket strips 54 and 55 are disposed in thechannel members 56 and 52 above the water level A in the sump portion 20so that these gaskets do not tend to conduct water upwardly from thesump portion 20. As shown in FIG. 3 of the drawings, the gasket 54 hasits lower end 69 well above the water level A in the sump 20.

As shown in FIG. 4 of the drawings, an evaporative cooler pad 62 isprovided with a substantially conventional box shaped frame 64 havinglateral flanges 66 which engage the edges 58 of the channel members 52.Additionally, this frame 64 is provided with a louver plate 70 havingconventional louvers 72 therein. As shown in FIG. 3, it will be seenthat the channel structures 50 and 52 extend from the upper edge of thesump pan in the bottom of the cooler to lower edges of the sidewalls 15of the top 14 and accordingly, the upper end of each evaporative coolerpad frame 64 extends into close proximity with a respective side 15 ofthe top 14 in acordance with conventional evaporative coolerconstruction. With reference to FIG. 4 of the drawings, it will be seenthat each evaporative cooler pad frame 64 at one of its laterallyextending flanges is disposed adjacent a respective one of the channels50 or 52.

The lower wall of the frame 64 is provided with an integral hook shapededge 74 which rests on the upper edge 66 of a side 56 of the pan portion20 or as shown best in FIG. 7 of the drawings.

As shown in FIGS. 4 and 8 of the drawings, a clip 76 is fixed to each ofthe vertical sections 36 of the side 16 and this clip 76 may be eitherspot welded or otherwise secured to the side sections 36 as desired. Theclip 76 is provided with an offset portion 78 which extends over thefolded portion 80 at the transition between the pan portion 20 and theside section 16. This folded portion 80 as shown in FIGS. 4 and 8 isformed about the fold lines 28 as shown in FIG. 1 of the drawings. Theoffset portion 78 of the clip 76 retains the folded portion 80 adjacentthe side portion 36 at each respective side of the side portion 16.

Each clip 76 is provided with a cylindrical loop portion 32 arranged toreceive the rod of a conventional standolf foot used to support anevaporative cooler in spaced relationship to the vertical wall of thebuilding and particularly where an evaporative cooler is mounted todeliver air through the opening 32 and into a horizontal duct 84communicating therewith as shown best in FIG. 3 of the drawings.

Communicating with the opening 32 is a blower 34 composed of a housinghaving spaced side plates 84 and 86. These side plates 84 and 86 aresecured together by a wrap around plate 88 having side flanges 90 whichoverlap the sides of the side plates 84 and 86. These side plates 84 and86 are provided with notches 92 in which the flanges 90 extend and passfrom an outside position to an inside position between the side plates84 and 86 permitting the wrap around plate 88 to extend between the sideplates 84 and 86 upwardly to a position adjacent the outlet opening 32and then inwardly to form a cutoff lip 94 adjacent the periphery of ablower Wheel 96 internally of the blower housing. The side plates 84 and86 are provided with inlet eye openings 98 concentric with the blowerwheel 96.

Each of the side plates 84 and 86 is provided with an angular braceadjacent to the side portion 16 and fixed thereto. These braces aresimilar and the side wall portion is provided with a triangular brace100 and a flange 102 which lends horizontal support to the lower edge ofthe side plate 84. This brace 100 is also provided with a flange 102secured to the side wall section 16.

Angular braces 106 are connected to the side plates 84 and 86 near thelower portion thereof and these angular braces 106 are fixed to theinwardly folded portions 39 of the corner structure of the pan portion20 or as shown best in FIGS. 3, 4, and 6 of the drawings.

Braces 108 are fixed to the side plates 84 and 86 adjacent to the upperportion of the blower housing and these braces 108 are connected toinwardly directed folded portions 110 in the corners of the top portion14 which folded portions are formed about the fold lines 24 shown inFIG. 1 of the drawings. These fold lines 24 providing for an inwardlyfolded section disposed at 45 degrees. Thus the braces 108 are connectedto folded structure which is similar to the folded structure 39 however,the folded structures 110 are disposed integral with the top portion 14and extend inwardly at an angle of 45 degrees to the corners as do thefolded sections 39.

In the modification of the present invention as disclosed in FIGS. 9 and10 a blank 112 is utilized and this blank 112 is similar to the blank 10shown in FIGS. 1 and 2 hereinbefore described. The blanks 10 and 112 areparticularly formed and adapted for insertion in a forming machine asdisclosed in a patent application of Adam Goettl and Robert Koble,Serial No. 252,243, filed January 17, 1963.

The blank 112 contains several improvements over the blank 10. The blank112 is provided with an opening 114 similar to the opening 32 in theblank 10 and comprises sections 116, 118 and which are all substantiallyrectangular and integral with each other and being of a common sheet ofmetal. The section 116 is adapted to be formed into a pan sumpstructure. The section 118 is adapted to be formed into a frame sideportion, and the section 120 is adapted to be formed into a topstructure all as will be hereinafter described.

As shown in FIG. 11 the blank 12 when formed into an evaporative coolerframe comprises a sump pan formed of the section 116 and comprisingthree upstanding sides 122, 124 and 126 which are integrallyinterconnected by folded corner portions 128, 130 and 132. These foldedcorner portions 128, 130 and 132 are folded at break lines 134, 136, 138and 140 on the blank 112 about the section 116 which is defined by breaklines 142, 144, 146 and 148. It will be seen that the frame side portion118 is defined by break lines 150, 152, 154 and 156, the break lines 156being predetermined break areas at which flanges 158 and 160 are formedat right angles to the frame side portion. These flanges 158 and 160 atthe folded portions 128 formed at the break lines 134 and 140 aresubstantially contiguous with and in claims substantially coincidingwith the respective upstanding sides 122 and 126 of the sump pan formedon the section 116. The flanges 158 and 160 are thus disposed verticallyand corner break lines 162 and 164 are formed of a plurality ofperforations to facilitate bending of the corner portions in the top ofthe frame structure thus these perforations facilitate forming and arenot critical since the top structure of the evaporative cooler does nothave to hold water. or sump portion of the cooler formed of the section116 of the blank 112 does not include perforations at the break lines134, 136, 138 and 140 due to the fact that this pan musthold water.

The break lines 162 and 164 therefore facilitate bending at corners 166as shown in FIG. 11 of the drawings. These two corners thus provide afolded corner between the upstanding frame side portion 118 and theflanges 158 and 160 and the downwardly directed sides of the topstructure 120 as will be hereinafter described. The top structure 120 isformed of the section .120 shown in FIG. 9 of the drawings and breaklines 168, 170, 172 and 174 define the angular break lines disposed todefine the transitions between the downwardly extending sides 176, 178and 180 of the top structure 120 shown best in FIG. 11. Folded cornerportions 182 and 184 are formed by lines of perforations 186 and 188similar to the hereinbefore described lines of perforations 162 and 164.Thus the corners 182 and 184 are formed in a very simple manner,however, these perforations forming break lines are not necessary asevidenced by the fact that the sump pan 116 at its corners is formed ofwater attached structure which does not include any perforations at thebreak lines. When forming an evaporative cooler frame by a machine suchas disclosed in the aforementioned patent application 252,243 theperforations 162, 164, 186 and 188 facilitate neat folding of the metalat the corners.

The flanges 158 and 160 are provided with edge sections 190 and 192which are subsequently formed into channel shaped in cross sectionevaporative cooler pad frame supporting portions 194. These portions 194being channel shaped in cross section provide an edge 196 of narrowbearing width which are adapted to engage an evaporative cooler padframe flange 198 and thus provide a minimum of bearing area so that thetransfer of salt accumulations from the pad frame to the flangestructures 158 and 160 may be minimized. As shown in FIG. 9 of thedrawings the blank 112 is also provided with edge portions 200, 202 and204 integral with the side forming portions 176, 178 and 180hereinbefore described. These portions 200, 202 and 204 are formed intochannel shaped in cross section portions 206 similar to the channelshaped in cross section portions 194 hereinbefore described inconnection with FIGS. 13, 14 and 27. These channel shaped in crosssection portions also provide a minimal bearing area for contact withevaporative cooler pad frames and for the same purpose as hereinbeforedescribed in connection with the structure disclosed in FIG. 27.

The blank 112 adjacent to the corners 182 and 184 is provided withnotches 206 and 208 which are beyond terminal portions 210 of thechannel shaped in cross section portions 205. Thus the notches 206 arebetween the terminal portions 210 of the channel shaped in cross sectionportions 205 and a corner of the top structure 120.

Reference is made to FIG. 17 wherein such a corner designated 212comprises the flange portions wherein the notches 206 are disposed.These notches 206 are disposed to receive joggled portions 214 disposedat the upper end of an L-shaped in cross section corner member 216 whichfits over the outer side of the corner portion 212. The corner member216 at its upper end 218 shown in FIGS. 17 and 18 is thus disposed onthe outside of the corner 212 and the joggled portions are disposed inthe notches 206. Tab portions 220 extending beyond the joggled portions214 engage inner sides of The pan the top side structure adjacent toterminal ends 210 of the channel shaped in cross section portions 285.

Reference is made to FIGS. 18 and 27 wherein the upper end portion 218is disclosed and each joggled portion 214 extends through one of theslots 2116. Each tab 220 is disposed on an inner side 222 adjacent aterminal end portion 210 of a respective channel shaped in cross sectionportion 205. The tab 220 is thus spot welded at 224 as shown best inFIG. 18 thereby providing a very rigid structure. The upper end portion218 is disposed at the outer side and welded by spot welds 226 all asshown best in FIG. 18 of the drawings.

Each of the corner posts 216 is substantially identical in constructionand as shown in FIG. 3 of the drawings there are two of them in opposedrelationship to the frame side portion 118. These corner members 216interconnect the sump pan 116 and the top structure 121) at tworespective corners in vertical alignment with each other. Each cornermember 216 at its opposite edges is provided with channel shaped incross section evaporative cooler pad frame supports 228 which aredisposed vertically and in parallel relationship with the channel shapedin cross section portions 194 hereinbefore described.

Each corner member 216 at its lower end is provided with an outwardlyoffset portion 238 fitted over the outside of each corner of the sumppan formed about break lines 136 and 138, thus covering the foldedcorner portions from the outside of sump pan.

Each corner of the sump pan formed about the break lines 136 and 138 issubstantially shown in FIG. 12 of the drawings wherein the upstandingsides 121 and 126 or other respective sides are provided with a portion232 which is folded against itself and another portion 234 which isfolded against the folded portion 232. These portions meet at 236 asshown in FIG. 12 of the drawings and the corner is thus formed and iscovered by the portion 230 of each corner member 216 as shown in FIG. 18of the drawings.

It will be seen that the lower portion of angular portion 130 as shownin FIG. 11 constitutes a lower portion of the folded structure 232 shownin FIG. 12 and that the upper edge of the folded structure at theangular folded portion 130 is above the normal water level in the sump116.

The folded corner structures 128 as shown in FIG. 11 are shown in FIG.13 in horizontal section and these folded portions 128 compriseangularly folded portions which are folded against each other at 238contiguous with another folded portion 240 which is integral with anupstanding side 126 and the frame side structure 118 which forms anotherupstanding side of the pan 116. It will be noted that the flange 160 ofthe frame side portion 118 is integral with the channel shaped in crosssection 194 hereinbefore described all as shown in FIG. 13 in thedrawings.

Reference is made to FIG. wherein the corner 212 shown in FIG. 17 isillustrated with the corner member 2 16 removed. Thus the slots 206 areshown in bottom plan position to illustrate an offset relationship ofthe structures adjacent the slots 206 and as shown in FIG. 27. It willbe appreciated that the edge portions of the sides 176 and 178 of thetop 120 are offset adjacent the slots 206. The edges 177 and 179 of thesides 176 and 178 adjacent to the slots 206 are offset inwardly withrespect to edge portions 181 and 183 which are engaged by the upperportion 218 of each corner member 216. The offset relationship of theseedges 177 and 181, and 179 and 183 as indicated by arrows A are ofsufficient dimension to compensate for the thickness of the flange 198of an evaporative cooler pad frame as shown in FIG. 27 of the drawings.

As shown in FIGS. and 21 a clip structure 242 is secured by spot weldsor other similar fastening means 244 to the sides 176 and 188 of the top121) for securing by a chain 246 or other means the upper portion of theevaporative cooler to a building or other structure designated 248. Theclip 242 overlaps a folded transition 25E) of the respective flanges 158and and the respective sides 176 and of the frame side portion 118.These clips 242 thus connect the upper portion of the evaporative coolerframe of the invention to the side of a building 248 while the lowerportions of the cooler as indicated and illustrated in FIGS. 23 and 24are provided with clips 252 which are secured by spot welds 254 to theflanges 158 and 166 of the side frame portion 118.

Each clip 252 is provided with an arcuate offset portion which is offsetlaterally, this portion being designated 256 in FIG. 23 of the drawingand shown connected to to a stand off bolt 258 in FIG. 24 in thedrawing. This bolt is provided with jam nuts 268 and 262 screw threadedthereon and jammed against opposite sides of the offset portion 256 tohold the bolt 258 longitudinally fixed with respect to the clip 252. Thebolt is provided with an engaging foot 264 disposed to engage the side248 of a building also shown in FIG. 21 of the drawing.

As shown in FIGS. 22 and 23 the blank and the formed sump pan structureare so arranged that when the structure is folded up as hereinbeforedescribed and shown in FIG. 23 that the folded portions 128 forwardabout to break line 140 include horizontal edge portions 129 of thefolded structure which is disposed outwardly of each respective flange158 and 160 of the frame side portion 118.

Each clip 252 is provided with an offset portion 253 which overlies theupper folded edge portions 129 and holds them in position.

The blank 112 shown in FIGS. 9 and 22 of the drawings is provided withnotch portions 266 at the ends of the portions 198 and 192 from whichthe channel shaped in cross section portions 194 are formed inconnection with flanges 158 and 160. These notches 266 provide relief atthe lower end of the structures which form the channel shaped in crosssection portions 194 hereinbefore described and similar notched sections268 relieve upper ends of these sections 190 and 192 shown in FIG. 9 ofthe drawings so that the channel shaped in cross section portions 194may be formed independently of the break lines 134, 140, 162 and 164when the folded corner portions are formed. As for example, the foldedcorner portion 128 as shown in FIG. 23 when completely formed comprisesa lower end of one of the channel shaped in cross section portions 194substantially flush with the upper folded edge portion 129. Thus thelower end 195 of the channel shaped in cross section portion 194 shownin FIG. 23 is free of the folded structure by reason of the fact thatthe notch 266 is first formed in the blank 112 before folding occursalong the break line 140 to form the folded corner structure 128.

It will be obvious to those skilled in the art that variousmodifications of the present invention may be resorted to in mannerlimited only by just interpretation of the following claims.

I claim:

1. In an evaporative cooler construction the combination of: arectangular box shaped sump pan having a bottom and two opposed pairs ofupstanding sides; a frame side portion integral with one of saidupstanding sides; two flange portions on said frame side portionsubstantially contiguous to an opposed pair of said upstanding sides ofsaid sump pan portion, said frame side portion and said flange portionsextending a considerable distance above said upstanding sides; andangularly folded portion at corners of said sump pan and integral withsaid upstanding sides thereof; a pair of said folded portions beingintegral with said two flange portions; said folded portions alldisposed and extending upwardly at an inclined angle relative to saidbottom and to an elevation above a liquid containing level in said sumppan.

2; The combination of claim 1 including: said flange portions disposedat substantially right angles to said frame side portion and formingcorner structures; and channel portions integral with said flangeportions and extending longitudinally thereof; and concaved sides ofsaid channel portions disposed and directed outwardly in directionstoward the outer sides of said sump pan.

3. The combination of claim 1 including: said flange portions disposedat substantially right angles to said frame side portions and formingcorner structures; and integral channel portions extendinglongitudinally in said flange portions; concave sides of said channelportions disposed and directed outwardly in directions toward the outersides of said sump pan; said channel portions being substantiallyparallel with said frame side portions and forming evaporative coolerpad frame supports disposed to support edge structure of evaporativecooler pad frames.

4. The combination of claim 1 including: a rectangular invertedbox-shaped evaporative cooler top structure car ried on said frame sideportion and disposed in opposed relation With said sump pan andvertically superimposed thereover.

'5. The combination of claim 1 including: a rectangular invertedbox-shaped evaporative cooler top structure carried on said frame sideportion and disposed in opposed relation with said sump pan andvertically superimposed thereover; and a pair of corner membersinterconnecting the corners of said sump pan and said top structurewhich are spaced from said side frame portion and said flange portions,whereby evaporative cooler pad frames may be disposed between saidportions and said corner members.

' 6; The combination of claim ll including: an inverted box-shaped topstructure integral with said frame side portion and said flanges andhaving folded portions forming a transition at right angles between saidframe side portion and said flange portions; perforated portionsdisposed to form a break line for said folded portions for precisefolding between said frame side portion and said top structure.

7. In an evaporative cooler construction the combination of: a top boxshaped portion, a side portion and a bottom pan sump portion, allintegral with each other and formed of a single sheet of metal; integralfolded portions extending inwardly at the corners of said top and panportions at transitions of said side portion with said top and panportions and at the corners of said top and pan portions opposite saidside portion; vertical corner posts interconnecting the corners of thetop and pan porr tions at corners opposite said side portion; andevaporative cooler pad frames disposed adjacent said corner posts, saidcorner posts having slots in the ends thereof straddling said foldedportions of said top and pan portions opposite said side portions forholding said folded portions together at said corners, said foldedportions extending above a liquid containing level in said sump.

8. In an evaporative cooler construction the combination of: a top boxshaped portion, a side portion and a bottom pan sump portion, allintegral with each other and formed of a single sheet of metal; integralangularly folded portions extending inwardly at the corners of said topand pan portions, at transitions of said side portion with said top andpan portions, said side portion having an opening therein; a pair ofvertically disposed blower side plates secured to said side portion atopposite vertical sides of said opening and curved edges of said blowerside plates spaced from said side portions; and a Wrap around platehaving flanged edges extending over said curved edges and adjacent tothe outer sides of said blower side plates; said blower side plateshaving notches to permit portions of said flanges to be disposedinwardly of said side plates, said flangesextending through said notchesand extending between said side plates near the lower portion thereof,said Wrap around plate and said flanges there of extending upwardly inengagement with the inner sides of said plates into close proximity ofsaid opening in said side portion; said wrap around plate having a lipportion extending inwardly toward the axial center of said curvedportions of said blower side plates; and a blower wheel rotatablymounted between said side plates and slightly spaced from said lip ofsaid wrap around plate.

9. In an evaporative cooler the combination of: an evaporative coolerpad frame having an evaporative cooler pad therein; a main cooler framein which said evaporative cooler pad frame is removably mounted; saidmain cooler frame having vertical channel shaped supports providinglateral support for said cooler pad frame and engaged thereby, saidcooler pad frame having lateral flange portions, said channel shapedsupports of said cooler frame having narrow lips engaged with saidlateral flange portions to provide a minimum contact surface betweensaid evaporative cooler pad frame and said main cooler frame.

10. The combination of claim 9 including: resilient gasket means in saidchannels, said resilient gasket means disposed above the sump of saidcooler and providing a seal between said cooler pad frame and saidevaporative cooler main frame.

11. In an evaporative cooler construction the combination of: a topinverted box-shaped portion; a frame side portion; and a box-shapedbottom liquid holding pan sump portion, all integral with each other andformed of a single sheet of metal; corners of said pan portion havingintegral angularly folded portions, said folded portions extendinginwardly of said corners andhaving substantially contiguous portionsintegral with each other, said integral folded portions extending abovethe normal liquid containing level of said pan sump portion therebyforming a Water tight seal at said corners.

112. The combination of claim 11, including: vertical corner membersinterconnecting a first pair of said corners of said top and panportions opposite said frame side portion, said frame side portionintegral with said angularly folded portions in a second pair of saidcorners; and evaporative pad frames disposed adjacent said cornermembers.

13. The combination of claim 11 including: vertical corner membersinterconnecting a first pair of said corners of said pan portion andsaid top portion; said frame side portion being integral with saidangularly folded portions in a second pair of said corners of said panportions; said integral folded portions in said second corners beingcontiguous with adjacent upstanding Sides of said pan portions; flangeportions on said frame side portion disposed at right angles thereto andin alignment and integral with said folded portions in said secondcorners; and evaporative cooler pad frames disposed adjacent said cornermembers.

14. In an evaporative cooler construction the combination of: arectangular box shaped sump pan having a bottom and two opposed pairs ofupstanding sides; a frame side portion integral with one of saidupstanding sides; two flange portions on said frame side portionsubstantially contiguous to an opposed pair of said upstanding sides ofsaid sump pan portion, said frame side portion and said flange portionextending a considerable distance above said upstanding sides; andangularly folded portions integral With said upstanding sides and saidflanges; said folded portions disposed and extending upwardly at anangle relative to said bottom and to an elevation above a liquidcontaining level in said sump pan; a rectangular inverted box shapedevaporative cooler top structure carried on said frame side portion anddisposed in opposed relation with said sump pan and verticallysuperimposed thereover; and a pair of corner members interconnecting thecorners of said sump pan and said top structure which are spaced fromsaid side frame portion and said flange portions whereby evaporativecooler pad frames may be disposed adjacent said flange portions and saidcorner members; said corner members being substantially ll L-shaped incross section and having a pair of free edge portions directedsubstantially ninety degrees from each other; and channel portionsintegral with said edge portions and disposed longitudinally of saidcorner members to provide supports for evaporative cooler pad frames.

15. In an evaporative cooler construction the combination of: arectangular box shaped sump pan having a bottom and two opposed pairs ofupstanding sides; a frame side portion integral with one of saidupstanding sides; two flange portions on said frame side portionsubstantially contiguous to an opposed pair of said upstanding sides ofsaid sump pan portion, said frame side portion and said flange portionextending a considerable distance above said upstanding sides; andangularly folded portions integral with said upstanding sides and saidflanges; said folded portions disposed and extending upwardly at anangle relative to said bottom and to an elevation above a liquidcontaining level in said sump pan; a rectangular inverted box shapedevaporative cooler top structure carried on said frame side portion anddisposed in opposed relation wits said sump pan and verticallysuperimposed thereover; and a pair of corner members interconnecting thecorners of said sump pan and said top structure which are spaced fromsaid side frame portion and said flange portions whereby evaporativecooler pad frames may be disposed adjacent said flange portions and saidcorner members; said corner members being L-shaped in cross section andhaving lower portions extending downwardly over the outer sides of thecorner portions of said sump pan.

16. The combination of claim 15 including: said sump pan having foldedcorner portions disposed on outer sides of said sump pan and inwardly ofsaid lower portions of said corner members.

17. In an evaporative cooler construction the combination of: arectangular box shaped sump pan having a bottom and two opposed pairs ofupstanding sides; a frame side portion integral with one of saidupstanding sides; two flange portions on said frame side portionsubstantially contiguous to an opposed pair of said upstanding sides ofsaid sump pan portion, said frame side portion and said flange portionextending a considerable distance above said upstanding sides; andangularly folded portions integral with said upstanding sides and saidflanges; said folded portions disposed and extending upwardly at anangle relative to said bottom and to an elevation above a liquidcontaining level in said sump pan; a rectangular inverted box shapedevaporative cooler top structure integral with said frame side portionand disposed in opposed relation with said sump pan .and verticallysuperimposed thereover; and a pair of corner members interconnecting thecorners of said sump pan and said top structure which are spaced fromsaid side frame portion and said flange portions whereby evaporativecooler pad frames may be disposed adjacent said flange portions and saidcorner members; said inverted box shaped top structure having verticallyslotted portions spaced from corners thereof; said corner members beingL-shaped in cross section and having joggled portions extending throughsaid vertically slotted portions; said joggled portions comprisingL-shaped structure extending around the outer side of corners of saidbox shaped top structure, said joggled portions comprising portions ofsaid corner members ex tending through said vertically slotted portionsof said top structure and engaging inner sides of said box shapedstructure inwardly and laterally of said slotted portions.

18. In an evaporative cooler construction the combination of: arectangular box shaped sump pan having a bottom and two opposed pairs ofupstanding sides; a frame side portion integral with one of saidupstanding sides; two flange portions on said frame side portionsubstantially contiguous to an opposed pair of said upstanding sides ofsaid sump pan portion, said frame side portion and said flange portionextending a considerable distance above said upstanding sides; angularlyfolded portions integral with said upstanding sides and said flanges;said folded portions disposed and extending upwardly at an anglerelative to said bottom and to an elevation above a liquid containinglevel in said sump pan; a rectangular inverted box shaped evaporativecooler top structure carricd on said frame side portion and disposed inopposed relation with said sump pan and vertically superimposedthereover; and a pair of corner members interconnecting the corners ofsaid sump pan and said top structure which are spaced from said sideframe portion and said flange portions whereby evaporative cooler padframes may be disposed adjacent said flange portions and said cornermembers; clip structure coupled to said flange portions and overlying apair of said upstanding sides of said pan, said clip structure havingoffset portions disposed to engage a stand-off bolt for supporting saidevaporative cooler construction in laterally spaced relationship to awall surface.

19. The combination of claim 18 including: second clip structurescoupled to said evaporative cooler construction in the proximity of saidflanges and said top structure, said last mentioned clip structuredisposed to provide for a connection between an upper portion of saidevaporative cooler construction and a building structure.

2t). In a blower frame and housing construction the combination of: apair of blower side plates having axial inlet openings and curved edgesdisposed radially outward from said openings, said side plates spaced toform axial ends of a blower; a wrap around plate wrapped around saidcurved edges and having inwardly directed flanges provided with firstedge portions extending toward the axes of said openings and overlyingthe outer sides of said plates, said wrap around plate being curved andhaving a convex outer surface and adapted to substantially enclose arotor therein; said side plates having second edge portions disposedbeyond the convex surface of said wrap around plate thereby forming atransition with said flanges overlying said side plates; one of saidedge portions having a notch therein at the transition of said overlyingportions of said side plates and said overlying flanges of said wraparound plate, said notch of said one edge portion fitted over the otherone of said edge portions permitting said flanges of said Wrap aroundplate to extend from the outer sides of said side plates to the innersides thereof; said side plates having connecting portions extendingbeyond said transition and forming brace structure for said side platesand said wrap around plate; an outlet for said blower housing disposedbetween opposite ends of said wrap around plate and said side plates;and frame structure at said blower outlet and connected to andsupporting said connecting portions of said brace structure.

21. In an evaporative cooler construction the combination of: a top boxshaped portion, a side portion and a bottom sump portion, all integralwith each other and formed of a single sheet of metal; integralangularly folded portions extending upwardly at the corners of said topand pan portions at transitions of said side portion with said top andpan portions; and vertical corner posts interconnecting the corners ofthe top and pan sections at corners opposite said side position; andevaporative cooler pad frames supported adjacent said corner posts, saidcorner posts having slots in the ends thereof straddling said foldedportions of said top and pan portions for holding said folded portionstogether, said corner posts having vertical channel portions providedwith narrow lips disposed to form a support for evaporative cooler padframes; and evaporative cooler pad frames engaging said narrow lips andsupported thereby.

22. In an evaporative cooler the combination of: an evaporative coolerpad frame having an evaporative cooler pad therein; a main cooler framein which said evaporative cooler pad frame is removably mounted; saidmain cooler frame having vertical channel shaped supports for providinglateral support for said cooler pad frame and engaged thereby, saidcooler pad frame having lateral flange portions, said channel shapedsupports of said cooler frame havin g narrow lips engaged with saidlateral flange portions to provide a minimum contact surface betweensaid evaporative cooler pad frame and said main 5 cooler frame; andresilient gasket means in said channels. References Cited by theExaminer UNITED STATES PATENTS 1/1917 Kiefer 220-62 10 4/1939 Piker220-62 3/1946 Seaman 261-30 10/1949 Soderman 261-92 1/1952 Osburn et a1.261-29 3/1953 Palmer 261-24 15 3/1953 RObic 261-30 8/1953 Woods 220-622,710,573 6/1955 Marker. 2,775,360 12/1956 Phillips 220-84 2,827,2703/1958 Martin 261-29 2,856,093 10/1958 Bruce 220-19 2,856,166 10/1958GOet-tl 261-29 2,906,512 9/1959 Meek 261-96 2,916,181 12/1959 Pfister etal. 220-62 2,967,051 1/1961 Mobley 261-30 2,984,464 5/1961 Herr 261-293,129,841 4/1964 Loewenthal et al. 220-62 FOREIGN PATENTS 594,836 3/1960 Canada.

ROBERT F. BURNETT, Primary Examiner. HARRY B. THORNTON, Examiner. T. R.MILES, Assistant Examiner.

1. IN A EVAPORATIVE COOLER CONSTRUCTION THE COMBINATION OF: ARECTANGULAR BOX SHAPED SUMP PAN HAVING A BOTTOM AND TWO OPPOSED PAIRS OFUPSTANDING SIDES; A FRAME SIDE PORTION INTEGRAL WITH ONE OF SAIDUPSTANDING SIDES; TWO FLANGE PORTIONS ON SAID FRAME SIDE PORTIONSUBSTANTIALLY CONTIGUOUS TO AN OPPOSED PAIR OF SAID UPSTANDING SIDES OFSAID SUMP PAN PORTION, SAID FRAME SIDE PORTION AND SAID FLANGE PORTIONSEXTENDING A CONSIDERABLE DISTANCE ABOVE SAID UPSTANDING SIDES; ANDANGULARLY FOLDED PORTION AT CORNERS OF SAID SUMP PAN AND INTEGRAL WITHSAID UPSTAND-